Thermal displacement correction device for working machine

A thermal displacement correction device for a working machine that includes a thermal displacement correction amount calculation unit for calculating a thermal displacement correction amount and configured to correct a thermal displacement amount caused by heat generated and radiated from the working machine and changing with time by the thermal displacement correction amount, the thermal displacement correction device for the working machine comprising:

• a correction error coefficient storage memory configured to store a correction error coefficient in response to the thermal displacement correction amount obtained in advance;
• and
• a processor configured to:
• calculate the correction precision of the thermal displacement correction amount based on
• the thermal displacement correction amount calculated by the thermal displacement correction amount calculation unit and
• the correction error coefficient stored in the correction error coefficient storage memory;
• check whether a processing operation is performed at predetermined correction precision by comparing the correction precision with a threshold value of predetermined correction precision;
• notify degradation in correction precision in response to a determination that the predetermined correction precision is not satisfied;
• and
• automatically stop a processing operation when the processor determines that the predetermined correction precision is not satisfied,
• wherein in response to a determination that the predetermined correction precision is satisfied, the processor is further configured to:
• skip the operation of notifying degradation in correction precision and the operation of automatically stopping the processing operation, and
• continue the processing operation by using the calculated thermal displacement correction amount.